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    Fuzzy match across codes, option descriptions, and model aliases. Every result is graded and, where the factory documents it, cited.
    W12 Single-source

    Oldsmobile · Regular Production Option

    Package, Touring Sedan

    Years 1988–90 Models 1
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    Also documented for CadillacChevrolet

    Documented applications

    Ninety-Eight — C-body, front-drive (1985–1990)
    • 1988–1990 Single-source

      four-door sedan with floor shifter; Wikipedia's Ninety-Eight article names the Touring Sedan's "W12 option package" and gives its production for 1987 through 1990; the NICB manuals print "98 Touring" for 1988–1989 and "98 Touring Sedan" for 1990 (symbol CV), so 1987 is not claimed

    This page aggregates every documented appearance of W12 in the Oldsmobile reference. Confidence and citations are shown per application — the same code can be better documented in one year than another.